Cup Stacking (Fun Educational Typing Game)

Cup Stacking Description: 
This is the typing game. Use both hands and your ten fingers to type the keys and stack the cups. Numbers or letters on the cups will be highlighted. Stack them by typing these letters or numbers. 
Cup Stacking Instruction: 
In this game, you need to stack and unstack the cups in a predefined sequence as quickly as possible. You stack or unstack the cups by typing the letters on them. You may only move a cup if there are no other cups stacking above it.